Looking for old DOS orbit simulator.

It was more of a game actually. I believe the name of it was Moon Shot, Moon Lander or something to that extent.

The game was laid out fairly simple. The entire game was composed of a white blob in the center of the screen (Earth) along with another eraser-head sized blob orbiting around the Earth at a slow, steady pace (the Moon). Both objects produced their own gravity field.... the Earth's was noticably stronger. The object of the game was to launch the probe (small white blip) from earth using your thrusters (directional keys) in an attempt to get the probe into a steady orbit around the earth. Your orbit may end up as highly eccentric or very close to circular depending on how long and in what direction you fire the thrusters.

Once in a steady orbit around the Earth, you then fire your thrusters in an attempt to place your probe in an intercept orbit around the Moon. If you can do this, you win.

The part about the game that really amazed me considering how simple it was, was how well the game simulated gravity. If you played around with it long enough, you could actually get your probe into sweet spots (Lagrange points) where it would just follow the orbit of the moon around the Earth... or have it orbit slightly ahead of the Moons orbit. The closer you are to the object, the greater the effect of gravity.

Please tell me someone has seen this game or may have a copy. I've been searching for four years now! :yuck: